Small update: Quality of life features

Hello everyone, vacation is over, so it's time to start building up features again. 

But it's good to start small, so for a fresh start I did some minor but important quality of life fixes. 

• You can now pause during the game and quit to mission select screen
• You can acess settings menu at the main menu and also pause screen 
• Sound volume slider added 
• Fullscreen/windowed mode added 
• Resolution selection added 
• Graphics quality selection added [Placeholder]

There were a couple of things I've missed in the last demo update like pause menu, sound and resolution settings.

Also I have finally found a solution to missing portraits bug. It's actully kinda stunning how obvious the solution was now that I look at it. But at least you can now meet some of the characters besides protagonist.